[Abagail]

Integers aren't set like strings are. There shouldn't be any ' in the SET string(relating to the = expression).

Example:
Your code:

pawn Code:

`Slot` = '1'

Proper code:

pawn Code:

`Slot` = 1

And as Sime30 stated, what is the purpose of updating when you can just insert all the needed data simple as?